Hand press



H. LORCH HAND lfRESS Dec. 25 1923.

Filed Feb. 21

atented Een. 25, i923.,

narran eras buch rarsnr HENRY LGRCH, OF CHICAGO, ILLIEIS, ASSGNOR TO J. F. HELll/IHLD @t BW., OF CHICAGO, ILLINOIS, A. CORORTON OF LLNOIS.

HAND PRESS.

Application filed February 21, 1921.

To all whom z'zf may concern:

Be it known that l, HENRY Lonen, a citizen of the United States, residing in Chicago, in the county of Cook and State of illinois, have invented anew and useful Improvement in Hand Fresses, of which the following is a specification.

rl`his invention relates to hand presses and has more particular reference to hand presses ofthe character shown, described and claimed in United States Letters Patent No. 7489947 granted January 5, 1904, to Julius l F. Helmhold.

i principal objectV of the present invention is the provision in such a hand press of numerous improvements in the construction and arrangement of the parts to permit greater efficiency of action and to increase the strength and durability of the press.

Another important object of the invention is the simplification of the construction of such a press through the. reduction in the number of parts. These presses are employed for working sheet metal generally and particularly for bending sheet metal strips for various purposes.V For example7 pressesV of this character are used'to make blades of strips of sheet metal of appropriate width which may be sharpened at one edge and used to cut and score stock in the manufacture of boxes of pasteboard, strawboard and the like. Presses thus employed must be of unusually sturdy construction and be capable of exerting enormous power in the bending operation.

vThe present invention contemplates the arrangement of the parts to eliminate any torsional or bending strains resulting from the operation of the hand lever through the location of the fulcrum of this lever in such position as tov produce in the lever carrying lugs a direct strain at right angles to their support.

Another important object of the invention is the location of all of the operating parts of the apparatus below the level of the dies, leaving the dies in effect surrounded by a fiat table from which they extend up into operating position.

Another important object of the invention is the provision of accurate means for adjusting the extent of die action to meet required conditions.

Numerous other objects and advantages Serial No. 446,570.

of the invention will be apparent as it is bet-- ter understood from the following description when considered in connection with the accompanying drawing illustrating a preferred embodiment thereof.

Referring to the drawing:

Figure 1 is a side elevation of a hand-press embodying my present invention;

Fig. 2 is a top plan view thereof; and

Fig. 3 is a transverse section taken sube stantially on the line 3 3 of Fig. 2.

For the purpose cf illustrating my invention l have shown on the drawing an apparatus in Awhich it is embodied. This apparatus comprises a base generally indicated by reference numeral 11. This base is pro vided at each end with inclined supporting walls 12 and 13 terminating in feet 14 adapted to rest upon or be secured to any suitable support7 holes 15 being provided for this purpose. A web 16, preferably, extends vertically between the inclined legs or walls 12 and 13 to reinforce the construction.

The base plate is cut away at 18 to receive two lateral side guides 19 providing undercut slots 21, these side guides being Vheld in place by screws 22. 1Withinthe guides 19 is mountedy a plunger 23 for horizontal reciprocation. This plunger is connected at its rear end by a toggle link 24 with the short arm 25 of a lever 26 having a long arm or handle 2? for manual operation. The lever is fulcrunied in lugs 2S extending up at right angles or normal to the inclined wall or leg 13. The upper ends of this lug have split bearings 29, in'whieh are mounted ecH centric-s 31 for a shaft or pin 32 passing through the eccentrics and through the lever. Lag screws 33 are arranged through the split sides of the lugs to tighten the lugs about the eccentrics 31 when these eccentrics have been turned to properly adjusted positions. A set .screw 34 is arranged through the' lever and into engagement with the Vrod or shaft 32 to hold this shaft in place and cause it to rotate in the eccentrics.

A recess 35 is provided in the forward top part of the base plate and in this is seated. the base 36 of a die carrier. This die carrier includes an upstanding integral postJ 37 in which is provided a dovetail slot 38 for receiving the dovetail base 39 of a die 41. A similar post 42 extends up from the forward end of the plunger 23 and this post has a dovetail recess 43 for a companion die 44. Oil holes 45 are provided through the guides for the purpose of lubrication.

y It will be manifest that thus constructed the lever, link, legs and other parts are arranged to leave the 4top portion of the plunger, the guides 19 and the top of the forward base plate part unobstructed with only the dies'extending up into operative position.V Furthermore, the lever fulcruni is so arranged that the forces resulting from its manipulation fall along the central aXis ofthe lugs 28 and at right angles to the end wall 13. Uniform adjustment of the dies toward and from each other may be accomplished by arrangementof the eccentiics 31 to meet required conditions.

l provide means for limiting the die action so that if desired the bending means be controllably confined to less than the bending capacity of the dies. This means in the present instance comprises a rod 5l loosely laid in an aperture 52 in the face and extending in the line of movement of the plunger. Behind l provide a set screw 53 which engages the end of the rod and holds it protruding into and along the path of movement-of the plunger the desired distance.

' lt is thought that the invention and many of its attendant advantages will be understood 'from the foregoing description, and it will be apparent that various'changes may be made in the form, construction and ar- `rangement of the parts without departing from the spirit and scope of the invention or sa-cricing allof its material advantages, the forni hereinbefore ydescribed being merely a` preferred embodiment thereof.

l claim:V Y

l. VA hand-press having, in combination, a horizontally disposed reciprocable plunger, a base plate upon which said plunger is mounted to slide, a hand lever spaced from said plunger, a link connecting said hand lever with said plunger, lugs integral with the base plate for supporting the fulcruin of the lever with the fulcrum arranged in the plane of sliding engagement lof the plunger and Idies carried respectively in said plunger and said base plate. 'f

2. A hand-press having, in combination, a

` horizontally disposed reciprocable plunger,

a base plate upon which said plunger is mounted to slide,-a hand lever, a link connecting said hand lever with said plunger,

lugs integral with the base plate for supporting the fulcruin of the lever, said lugs being inclined so that the force resulting from operation of the lever falls along'substantially the central axis of said lug, and dies carried respectively in said plunger and said base plate.

Y 3. A. hand-press having, in combination,a Y horizontally disposed recipi'ocable plunger,

a base plate upon which said plunger is mounted to slide. a hand lever, a'linhcon-V base plato, a die in said plunger, a lever for moving said plunger, and an eccentric mounting for said lever arrangeableto provide adjustineiitfoi" said dies toward Vand from each other in operation.

5. ln a hand press for the described purposes, the combination of a base plate, a bending die arranged thereon, a plunger slidable Yin said base plate,a die in said plunger, and vadjustable means in said base plate acting upon and limiting the movement of the plunger in the die bending operation.

6. ln al handpress for the described purposes, the combination of a base plate, a die arranged thereon, a plunger slidable in said base late a die in vsaid aluncrer and ad- L Y z: 7

)useable means disposed through the base plate and engaging the forward face` of thev plunger to limit t-he extent of die action.-

7. In a hand press, the combinationfof a sev supporting base, a plunger slidably mounted herein, dies mounted respectively onv said base and plunger, lugs protruding at right angles from an angular port-ion of said base, a lever fulcruined in said lugs, and means connecting said lever and said plunger, said lugs being adapted toY receive the force resultant V.from operation of saidV levei' von a central line` in the direction iny which it eittends from the support.

HENRY Lonen." 

